fat is relatively simple and easy, that of meat or other protein of this class is an exceedingly complicated and difficult process, or rather, number of processes. The body cannot use this material in the form in which it is eaten. So it is as if one bought a house which could not be used as it stood, but which must be pulled apart, taken to pieces, separated into isolated boards, bricks, shingles, etc., from which had to be constructed an entirely different dwelling. Naturally there would be considerable debris, a number of boards, bricks, etc., that could not be used and which would have to be gotten out of the way or destroyed. By digestion, this kind of food, flesh food, egg white, milk casein, wheat gluten, etc., is split apart and broken up into some twenty or more separate substances, some of which are useful and harmless, others not only useless, but harmful, and in some cases actually poisonous. As a result of digestion, all these substances, good as well as bad, are absorbed into the blood and carried by it all over the body so that each and every cell of the body can select whatever substance it needs. The useless or harmful substances, as well as the excess of the useful portion of the digested food, are taken to the liver, in which such irritating and poisonous substances are made over into less harmful waste, part of which is returned to the bowels to be gotten rid of by their evacuation, and the rest sent to the kidneys, and so passed out of the body. Therefore it is easy now to understand that if too much of this kind of food is eaten it entails extra work on the part of the liver and kidneys, with the result that they do not work as thoroughly as they should to neutralize or destroy irritating or poisonous material sent to them to be acted upon. As a result such incompletely changed ma-5